Explosive container

Claim 1

IN A BLOW-MOLDED PLASTIC CONTAINER ADAPTED TO BE FILLED WITH AN EXPLOSIVE AND TO BE CONNECTED INTO AN EXPLOSIVE COLUMN ASSEMBLY WITH LIKE CONTAINERS, A SUBSTANTIALLY CYLINDRICALLY SIDE WALL INCLUDING A CENTRAL BODY PORTION WITH A THREADED END PORTION AND A TUBULAR END PORTION AT THE OPPOSITE ENDS THEREOF, CLOSURE MEANS FOR CLOSING SAID CONTAINER AT THE END OF SAID THREADED END PORTION AND AT THE JUNCTURE OF SAID TUBULAR END PORTION AND SAID BODY PORTION, SAID THREADED END PORTION HAVING AN INTEGRAL EXTERNAL SCREW THREAD DIMENSIONED RELATIVE TO SAID TUBULAR END PORTION WHEREBY THE THREADED END PORTION OF THE CONTAINER IS ADAPTED TO BE INSERTED ENDWISE INTO THE TUBULAR END PORTION OF A LIKE CONTAINER, SAID TUBULAR END PORTION HAVING A PLURALITY OF TABS FORMED IN THE SIDE WALL THEREOF WITH EACH OF SAID TABS BEING RESILIENT AND ADAPTED TO BE DEFLECTED BY SAID THREAD, SAID TABS HAVING AN ACTIVE SURFACE SPIRALLY OF SAID TUBULAR END PORTION ON A HELIX ANGLE CORRESPONDING TO THAT OF SAID THREAD AND ADAPTED TO COOPERATE WITH THE THREAD OF A LIKE CONTAINER TO PROVIDE A THREADED COUPLING THEREWITH; THE IMPROVEMENT COMPRISING A SLEEVE SLIDABLY MOUNTED ON AND CLOSELY EMBRACING THE PERIPHERY OF SAID TUBULAR END PORTION SAID SLEEVE BEING MOVABLE ENDWISE OF SAID CONTAINER TO A LOCKING POSITION OVERLYING SAID TABS AND A RELEASED POSITION CLEAR OF SAID TABS, SAID TABS HAVING LOCKING SURFACES ADAPTED TO ENGAGE AGAINST SAID SLEEVE IN THE LOCKING POSITION TO PREVENT MOVEMENT OF SAID TABS TO THE DEFLECTED POSITION AND THEREBY PREVENTING MOVEMENT OF SAID THREAD RELATIVE TO SAID TABS ENDWISE OF THE CONTAINER WHILE PROVIDING A THREADED CONNECTION BETWEEN A PAIR OF JOINED CONTAINERS.